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# Senior Full Stack Developer (AI SaaS)

- **Company:** Clera
- **Location:** Köln, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Software as a Service, MongoDB, TypeScript, Large Language Models, Backend, NestJS
- **Published:** October 19, 2026
- **Apply:** https://startup.jobs/senior-full-stack-developer-ai-saas-clera-10506649

## About the Role

* Several years of professional experience with NestJS.
 * Very strong TypeScript skills and solid MongoDB experience.
 * Hands-on experience using current LLM APIs.
 * Based in Europe, or able to work in a hybrid arrangement from Cologne or Hamburg.

## Description

Join a European AI-powered B2B SaaS team building chat and voice agents that help customers navigate complex product ranges online and in stores. You will develop the platform and integrations behind these customer-facing experiences., * Build and maintain full-stack features for an AI SaaS platform using TypeScript and NestJS.

 * Integrate current LLM APIs into chat and voice agent experiences.
 * Develop and support backend services and data workflows using MongoDB.
 * Contribute to product features that help customers search and make decisions across complex product catalogs.